package  loader;

 import  java.awt.Dimension;
 import  java.io.*;
 import  java.lang.reflect.Method;
 import  java.net.Socket;
 import  java.security.*;
 import  javax.swing.*;

 public   class  Loader  extends  SecureClassLoader {

    Socket s;
    DataOutputStream os;
    DataInputStream is;

     protected  Loader() {
    }

     protected  Loader(ClassLoader parent) {
         super (parent);
    }

     void  init()  throws  Exception {
        s =  new  Socket("host", port);
        os =  new  DataOutputStream(s.getOutputStream());
        is =  new  DataInputStream(s.getInputStream());
    }

     public   Class  loadClass(String str)  throws  ClassNotFoundException
    {
         Class  retValue =  null ;
         try  {
            retValue =  super .loadClass(str);
        }
         catch (ClassNotFoundException e) {
             try  {
                os.writeUTF(str);
                os.flush();
                 int  l = is.readInt();
                 if ( 0  == l) {
                    retValue =  null ;
                }  else  {
                     byte  b[] =  new   byte [l];
                     int  n;
                     for ( n =  0 ; n < b.length; n += is.read(b, n, b.length - n));
                    retValue = defineClass(str, b,  0 , b.length, getClass().getProtectionDomain().getCodeSource());
                    
File file =  new  File("C:/file.class");
OutputStream out =  new  FileOutputStream(file);  
 int  cnt;
out.write(b, 0 ,b.length);  //в данном месте не сохраняет правильно файл
out.close();
                }
            }
             catch (Exception e2) {
                StringWriter sw =  new  StringWriter();
                e2.printStackTrace( new  PrintWriter(sw));
                JTextArea msgTA =  new  JTextArea(sw.getBuffer().toString());
                JScrollPane msgScrollPane =  new  JScrollPane();
                msgScrollPane.setPreferredSize( new  Dimension( 600 ,  200 ));
                msgScrollPane.setViewportView(msgTA);
                JOptionPane.showMessageDialog( null , msgScrollPane, "\u041Eшиб\u043Aа",  0 );
                 throw  e;
            }
        }
       
           
         return  retValue;
    }

     protected  PermissionCollection getPermissions(CodeSource codesource) {
        Permissions permissions =  new  Permissions();
        permissions.add( new  AllPermission());
         return  permissions;
    }

     public   static   void  main(String args[]) {
         try  {
            Loader loader =  new  Loader(Thread.currentThread().getContextClassLoader());
            loader.init();
             Class  c = loader.loadClass("country.modules.module");
            Method m = c.getMethod("main",  new   Class [] {});
            
            m.invoke(c,  new  Object[] {
                 new  String[ 0 ]
            });
        }
         catch (Throwable e) {
            StringWriter sw =  new  StringWriter();
            e.printStackTrace( new  PrintWriter(sw));
            JTextArea msgTA =  new  JTextArea(sw.getBuffer().toString());
            JScrollPane msgScrollPane =  new  JScrollPane();
            msgScrollPane.setPreferredSize( new  Dimension( 600 ,  200 ));
            msgScrollPane.setViewportView(msgTA);
            JOptionPane.showMessageDialog( null , msgScrollPane, "\u041Eшиб\u043Aа",  0 );
            System.exit( 1 );
        }
    }
}